512MB+4GB or 2x2GB?

Discussion in 'MacBook' started by bjornm, Jun 11, 2011.

  1. bjornm macrumors member

    Jun 20, 2008
    I just ordered the "wrong" memory for a Macbook I am upgrading.
    The original config is 1 GB RAM (2x512 MB) and I wanted to upgrade to 4GB RAM (2x2GB).

    I ordered a single 4GM RAM stick by mistake though and while my first thought was to exchange it, I am now wondering if it is preferred to keep the 4GB stick and combine it with one of the old ones.

    Wondering about differences in performances and general pros and cons.

    Note though that I will not upgrade this laptop anymore and the RAM is 200 pin so it will not be moved over to the next laptop as it will likely use 204 pin RAM.

    I did read the "understanding RAM guide" but it does not give a consistent answer.
  2. alust2013 macrumors 601


    Feb 6, 2010
    On the fence
    I don't know that the machine will recognize a 4GB stick, but I could be wrong.
  3. Skizoboy macrumors newbie

    May 29, 2011
    What's the exact model of this macbook you're upgrading?
  4. iThinkergoiMac macrumors 68030

    Jan 20, 2010
    Depends on the MacBook. From the 3,1 model onward, you can get 6 GB or more in, which necessitates the ability to see and use at least 1x 4 GB stick. Once the OP tells us which model he has, we'll be able to know.

    Long and short of it: if you have the 1,1 or 2,1 MacBook, the RAM won't work. If you have 3,1 or onward, you'll be set.

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